Nucleus implant and method
First Claim
1. A spinal stabilization system for insertion into a cavity formed by the removal of a desired amount of a nucleus in an intervertebral disc comprising:
- a bag; and
a spiral implant implanted into the bag.
1 Assignment
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Accused Products
Abstract
The present invention provides intervertebral disc nucleus inserts that may fully or partially replace the natural, or native, intervertebral nucleus. The present invention may include a hydrogel bag outer body that includes an interior cavity for introducing a spiral implant device. The hydrogel bag may be introduced through a cannula into the intervertebral space after a cavity of a desired shape and size has been cleared. The combination of the spiral implant resting configuration and the hydrogel bag substantially fills the cavity. The combination of the spiral implant and the hydrogel bag may improve upon 1) implant expulsion or extrusion; 2) implant sizing; 3) implant conformity; and 4) reduction or prevention of bone edema. In further embodiments the hydrogel bag may include an inner and outer layer or two complimentary bags joined into one structure to better distribute the load between the vertebral endplates.
209 Citations
30 Claims
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1. A spinal stabilization system for insertion into a cavity formed by the removal of a desired amount of a nucleus in an intervertebral disc comprising:
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a bag; and
a spiral implant implanted into the bag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for repairing a damaged intervertebral disc comprising:
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removing a desired portion of a nucleus of the intervertebral disc to form a cavity;
inserting a PVA hydrogel bag into the cavity, the PVA hydrogel bag including a wall forming an interior and an opening;
inserting a spiral implant into the interior of the PVA hydrogel bag through the opening; and
closing the opening of the PVA hydrogel bag. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An intervertebral disc nucleus pulposus implant, comprising:
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a PVA hydrogel bag sized for introduction into a cavity created in an intervertebral disc space, the PVA hydrogel bag including a closeable opening in the bag; and
a spiral implant for insertion into the PVA hydrogel bag after the PVA hydrogel bag is inserted into the cavity in the intervertebral disc space.
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18. A spinal stabilization system comprising:
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a bag;
an inner body for placement inside of the bag; and
a spiral implant for insertion into the bag. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for replacing nucleus of an intervertebral disc, said method comprising:
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removing a desired portion of an intervertebral disc nucleus from a patient thereby creating a cavity within the annulus fibrosus;
inserting a prosthetic bag into the cavity using a cannula, the bag including an inner cavity and an opening;
placing one or more bodies into the bag;
positioning a spiral implant into the bag; and
closing the opening using a closing mechanism. - View Dependent Claims (28, 29, 30)
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Specification